Most of the major trade unions have now named their preferred winner in the Labour leadership contest. Here is our quick run-down of TU endorsements, alongside their 2015 nominations.
| Union | Nomination (2016) | Nomination (2015) |
| Aslef | Jeremy Corbyn | Jeremy Corbyn |
| Bectu | Yet to declare | Did not declare |
| BFAWU | Jeremy Corbyn | Jeremy Corbyn |
| Community | Owen Smith | Yvette Cooper |
| CWU | Jeremy Corbyn | Jeremy Corbyn |
| Fire Brigades Union | Jeremy Corbyn | Jeremy Corbyn |
| GMB | Owen Smith | Did not declare |
| Musicians union | Owen Smith | Andy Burnham |
| National Union of Mineworkers | Yet to declare | Yvette Cooper |
| TSSA | Jeremy Corbyn | Jeremy Corbyn |
| Ucatt | Jeremy Corbyn | Andy Burnham |
| Unison | Jeremy Corbyn | Jeremy Corbyn |
| Unite | Jeremy Corbyn | Jeremy Corbyn |
| Usdaw | Owen Smith | Andy Burnham |
The RMT and the Prison Officers’ Association, which are not affiliated to Labour, both supported Corbyn last year. The RMT has backed Corbyn again this year but the POA is yet to declare. The FBU affiliated to Labour in November last year, meaning it did not have a formal link with the party when it made its nomination last summer.
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